Loco moti ve-boiler



(No Model.)

J. S. NEWLIN. LOGOMOTIVB BOILER.

No. 489.827. Patented Jan. 10. 1893.

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UNITED STATES PATENT OEEICE.

JOSEPH SIDNEY NEWLIN, OF FAIRFAX, SOUTH CAROLINA, ASSIGNOR OF ONE-FOURTH TO VIRGIL VALKER, OF SAVANNAH, GEORGIA.

LOCOlVIOTIVE-BOILER.

SPECIFICATION forming part of Letters Patent No. 489,827, dated January 10, 1893.

Application filed October 5, 1892. Serial No. 447,899. (No model.)

To all whom t may concern:

Be it known that I, JOSEPH SIDNEY N EWLIN, of Fairfax, in the county of Barnwell and State ot' South Carolina, have invented a new and useful Improvement in Locomotive-Boilers, of Which the following is a specification.

My invention is in the nature of an irnprovement in locomotive boilers designed to secure a more perfect utilization of the fuel, and a greater amount of heat.

It consists in the peculiar means for returning the Iiames and hot currents through the iiues of the boiler as hereinafter fully described.

Figure l is a vertical longitudinal section of a locomotive furnace and boiler and Fig. 2 is a detail View of one of the parts.

Gand H are the iues of the boiler through which the hot curren ts pass from the lire box to the smoke stack. At the ends of these iiues I provide what I call return ends F. These consist of U-shaped tubes each having its two legs or branches a a made tapering and provided exteriorly with screwthreads of deep cut and thin threads. The outside bends bof these return ends are made thick and heavy with a sort of anvil head to permit hammering thereon Without damage to the These return ends are designed to be driven into two adjacent Iire flues GII, so

as to take the currents that passforvvardlyin one flue G and return them backward through the adjacent Iiue H, and then forward again into the smoke box through another flue G, thus securing a much longer travel of the hot currents through the boiler and a better utilization of the heat. The screw threaded ends on the return ends are not to be rotated or turned in, but are to be driven in by blows of a hammer delivered on the anvil heads of the return ends, the thin screw threads under this treatment being mashed to a close iit and holding` firmly to the inner edges of the tlues When so driven to place.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The return ends F having a thickened anvil head and tapered branches having deep threads cut thereon substantially as shown and described.

2. The combination with the tlues GHin a boiler; of the return ends7 F havingathickened anvil head and tapered branches having deep threads cut thereon substantially as shown and described.

JOSEPH SIDNEY NEWLIN.

Witnesses:

J. W. WILLIAMS, G. S. ONEAL. 

